Shock Doctor Gel Max Mouthguard Heavy-duty Kraton rubber exoskeletal shock frame and Gel-Fit liner provide protection, fit and comfort in an easy-to-fit, triple-layer design. Gel liner takes an exact impression of the teeth providing a tight, comfortable fit. Breathing channel allows for easy breathing while clenched. Quick-release helmet tether. $10,000 dental warranty. Actual color may vary. For adults ages 11 and up.